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Archiv der Mathematik

, Volume 72, Issue 6, pp 473–480 | Cite as

The Minding formula and its applications

Article

Abstract.

We apply the Minding Formula for geodesic curvature and the Gauss-Bonnet Formula to calculate the total Gaussian curvature of certain 2-dimensional open complete branched Riemannian manifolds, the \(\cal M\) surfaces. We prove that for an \(\cal M\) surface, the total curvature depends only on its Euler characteristic and the local behaviour of its metric at ends and branch points. Then we check that many important surfaces, such as complete minimal surfaces in \({\Bbb R}^n\) with finite total curvature, complete constant mean curvature surfaces in hyperbolic 3-space H3 (–1) with finite total curvature, are actually branch point free \(\cal M\) surfaces. Therefore as corollaries we give simple proofs of some classical theorems such as the Chern-Osserman theorem for complete minimal surfaces in \({\Bbb R}^n\) with finite total curvature. For the reader's convenience, we also derive the Minding Formula.

Keywords

Free Surface Riemannian Manifold Minimal Surface Branch Point Curvature Surface 

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Copyright information

© Birkhäuser Verlag, Basel 1999

Authors and Affiliations

  • Yi Fang
    • 1
  1. 1.Centre for Mathematics and its Applications, School of Mathematical Sciences, The Australian National University, Canberra, ACT 0200, AustraliaAustralia

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